Numerical Simulation of Temperature Field in the Full Friction Stir Welding Process for 7022 Aluminum Alloy

FEM analysis model of temperature field was built up based on the division of friction stir welding process and the corresponding heat input model. Through solving the established model, temperature field distributions of these four stages including the tool inserting welding, the initial welding, the stable welding and the end-up welding stage were obtained. And verification of FEM model was carried out by thermal couple test. Results show the simulation results of temperature were accorded with the experimental results basically.